basically:
- use of legislation, cases, media and documents
- good structure- i.e. for effectiveness dont restrict ur self to the key terms accessibility, resourcse efficiency etc. as basis of ur structure- centre it around the issue
- upto date statistics and media articles
- most importantly - there has to be an argument- most often questions are about 'evaluate' or 'assess' in which case an evaluation throughout the essay is importnat- dont story tell!!!
- solid introduction and conclusion- use your introduction to briefly introduce all points your gonna talk about and then the conclusion should be a good summing up of all these points>>>>this is however NOT the most important point to implement
- legal terminology- use words that are part of syllabus, this is where all the terminology from effectiveness of the law shoudl be coming in
- judgement terminology- words like 'therefore', 'most significantly' or 'however' show that you are evaluating
-finally know ur stuff- know the syllabus points well- know what things like 'alternative family arrangments' etc means- the more comfortable you are knowing the basic knowledge, the easier will it be for you to write an essay on it!!
good luck and hope this helps =]